NORMALAIR LIMITED <br/><br/>
Oxygen assault equipment instruction manual. 

 -  The Company  Yeovil  [n.d.] 
 - 8 leaves, 11 plates, illus.  30cm. 
<br/><br/> This open circuit oxygen was used on the first ascent of Everest, 1953 by Hillary and Tensing.  Photocopy of typescript 
<br/><br/><label>Dewey Class. No.: </label>031.4